RE: Gobbler Yelps
I think the yelps have been covered well. My experience is that gobbler's won't talk much in the fall. I have had good sucess calling gobblers by just using raspy clucks. I discovered this one day in deer season when I had 4 gobblers come by me and about every min or so one of them would give a couple clucks as they scratched. Works well for me, your mileage may vary.